# fill rectangles with colors

4 views (last 30 days)
ahmed noori on 4 Aug 2020
Commented: ahmed noori on 5 Aug 2020
hello ..
i used this instraction to plot rectangles with defrent colors ..i need help to fill those rectangles with colors .>>
thanks for hellllp :)
.plot([posx posx+Element(i).W posx+Element(i).W posx posx],...
[posy posy posy+Element(i).H posy+Element(i).H posy],...
'-','color',cl(i,:))

Sudheer Bhimireddy on 4 Aug 2020
Try this:
With the vertices you have, create surfaces and adjust the Z value to see the overlap. However, this way hides the overlapped regions and shows only the top most surface as shown in the attached image.
h=figure;
surf([0 1;0 1],[0 0;1 1],[1 1;1 1]);
hold on;
surf([0 2;0 2],[0 0;2 2],[1 1;1 1]-0.01);
surf([1.4 1.8;1.4 1.8],[1.4 1.4;1.8 1.8],[1 1;1 1]+0.01);
surf([0.7 1.2;0.7 1.2],[0.7 0.7;1.2 1.2],[1 1;1 1]+0.02);
view([0 90]);
Result:
Hope this helps.

#### 1 Comment

ahmed noori on 5 Aug 2020
thanks ..i ll try it

Image Analyst on 4 Aug 2020
Did you try the rectangle() function? It has options for 'FaceColor', and 'EdgeColor'.

ahmed noori on 5 Aug 2020
thanks for answer ...
i tried but this fuction can not gives different colors for rectangles in same loop
Sudheer Bhimireddy on 5 Aug 2020
If you are using rectangle() inside the loop and have manageable number of them, make sure to alter the 'FaceColor' and 'EdgeColor' properties each time the method is invoked.
% this way you will have more control over coloring them
edge_colors = {'k','r','b','m','g','c'};
face_colors = {'k','r','b','m','g','c'};
h = figure;
clf;
hold on;
for i =1:n
rectangle([ ],[ ],'FaceColor',face_colors{i},'EdgeColors',edge_colors{i});
end
ahmed noori on 5 Aug 2020
thank you ..it was so useful

Image Analyst on 5 Aug 2020
Try this:
numRects = 20;
positions = rand(numRects, 4); % Positions = [x, y, width, height]
% this way you will have more control over coloring them
edge_colors = rand(numRects, 3);
face_colors = rand(numRects, 3);
h = figure;
clf;
hold on;
for k = 1 : numRects
rectangle('Position', positions(k, :), 'FaceColor',face_colors(k, :),'EdgeColor',edge_colors(k, :), 'LineWidth', 2);
end
grid on;

#### 1 Comment

ahmed noori on 5 Aug 2020
that was so useful ... thanks